This chapter investigates the relationship between postmodernism, interpretivism, and formal ontologies,
which are widely used in Information Systems (IS). Interpretivism has many postmodernist traits. It
acknowledges that the world is diverse and that knowledge is contextual, ever-changing, and emergent.
The acceptance of the idea of more than one reality and multiple understandings is part and parcel of
postmodernism. Interpretivism is, therefore, characterized as a postmodern research philosophy. To
demonstrate this philosophical premise more concretely, the creation of the logical structure of formal
ontologies is sketched as an example of typical interpretivist and postmodernist activity in IS.